Leptogenesis in the exceptional supersymmetric standard model: flavour dependent lepton asymmetries


King, S.F, Luo, R, Miller, D.J. and Nevzorov, R. (2008) Leptogenesis in the exceptional supersymmetric standard model: flavour dependent lepton asymmetries. Journal of High Energy Physics, 2008, (12), 042. (doi:10.1088/1126-6708/2008/12/042).

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Description/Abstract

We calculate flavour dependent lepton asymmetries within the E6 inspired Supersymmetric Standard Model (E6SSM), which has an extra U(1)N symmetry. In this model, the right-handed neutrino doesn't participate in gauge interactions, allowing it to be used for both the see-saw mechanism and leptogenesis. Extra Higgs, leptons and leptoquarks predicted by the E6SSM contribute to the ordinary lepton CP asymmetries induced by the decays of the lightest right-handed neutrino (and sneutrino) and give rise to a set of extra decay asymmetries. We find that the CP asymmetries can be relatively large, even when the lightest right-handed neutrino is as light as 106 GeV.

Item Type: Article
ISSNs: 1126-6708 (print)
1029-8479 (electronic)
Subjects: Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy > Southampton High Energy Physics
ePrint ID: 144087
Date Deposited: 26 Apr 2011 13:09
Last Modified: 27 Mar 2014 19:05
URI: http://eprints.soton.ac.uk/id/eprint/144087

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